Memory Game The Endocrine SystemOnline version Review the organs of the endocrine system and their functions. by Kathy Dilliplane Adrenal Glands The body's "Master Gland" that controls the other endocrine organs. Helps the immune system recognize and fight pathogens Regulates blood sugar levels Testes Thymus Ovaries Thyroid Pancreas Produces melatonin to regulate sleep cycles Parathyroid Glands Regulates the female reproductive system Regulate the male reproductive system Regulates calcium levels in the blood. Pineal Gland Regulates growth and metabolism Increase heart rate during a "Fight or Flight" response Pituitary